Release automation

[bryevdv]

@mattpap @philippjfr If someone will write down the steps required to publish this package I will create a manual trigger GH Action similar to the one in the main Bokeh repo

[mattpap]

https://github.com/bokeh/jupyter_bokeh/blob/main/scripts/deploy.sh is what I use, though it requires manual changes to package.json.

[bryevdv]

What changes, just updating the version, or something else?

[mattpap]

Just the version (using the version scheme from README.md).

[bryevdv]

👍 should not be a problem then, I will try to prioritize this and some other testing/automation on this repo in the next few weeks.

[bryevdv]

Noting that we really should be publishing wheels at this point as well

ref: #146